Abstract
The energies and relative intensities of γ-rays following the β-decay of 78As (and 76As) to levels in 78Se (and 76Se) have been measured using an 8 cm 3 Ge(Li) spectrometer. The β-decay of 78As has been measured using a superconducting magnet beta-ray spectrometer with two 3 mm thick Si(Li) detectors. These data plus β-γ and γ-γ coincidence results have been used to construct a level scheme with 18 excited levels in 78Se. The half-life of 78As was measured to be 90.7±0.2 min.
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